Patents by Inventor Motohiko Hiramatsu

Motohiko Hiramatsu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electro-magnetic drive control valve
    Patent number: 5443241
    Abstract: An electro-magnetic drive control valve having a housing defining valve seats 54 and 66, and valve members 68 and 70 arranged so as to face the valve seat 64 and 66, respectively. The valve members 68 and 70 are formed on a valve rod 67, which is mechanically connected to a solenoid actuator 46. First and second diaphragm members 88 and 96 are provided for connecting the valve rod 67 to the housing and for sealing a flow passageway in the housing, while the valve rod 67 is axially moved by the solenoid actuator 46. The first diaphragm 88 is for sealing the flow passageway to the space 104 inside the solenoid actuator 46. The second diaphragm 96 forms a second chamber 107 on one side thereof remote from the flow passageway. An axial opening 67-2 is formed in the valve rod 67 for creating a communication passageway for connecting the chambers 104 and 106 with each other for equalizing the pressure therein.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: August 22, 1995
    Assignees: Nippondenso Co. Ltd., Tokai Riki Mfg. Co.
    Inventors: Michiya Odaira, Kazunori Sugihara, Noriyoshi Miyajima, Takumi Miyaki, Motohiko Hiramatsu